2019 MATE Documentation Project 2009 Paul Cutler 2004 Sun Microsystems 2001 2002 2004 Bill Day MATE Documentation Project GNOME Documentation Project &legal; MATE Documentation Project MATE Desktop Sun GNOME Documentation Team Sun Microsystems Bill Day

billday@bellatlantic.net

Paul Cutler GNOME Documentation Project

pcutler@foresightlinux.org

System Monitor Manual V&manrevision; July 2015 MATE Documentation Team MATE Documentation Project System Monitor Manual V2.2; March 2009 Paul Cutler pcutler@foresightlinux.org GNOME Documentation Project System Monitor Manual V2.1 February 2004 Sun GNOME Documentation Team GNOME Documentation Project System Monitor Manual V2.0 November 2002 Bill Day billday@bellatlantic.net GNOME Documentation Project Procman Manual V0.11 January 2002 Bill Day billday@bellatlantic.net GNOME Documentation Project This manual describes version &appversion; of &app;. To report a bug or make a suggestion regarding the &app; application or this manual, follow the directions in the MATE Feedback Page. &app; gives users a graphical user interface for monitoring CPU, network, and memory activities as well as a way for viewing and stopping system processes. System Monitor mate-system-monitor procman The &app; application enables you to display basic system information and monitor system processes, usage of system resources, and file systems. You can also use &app; to modify the behavior of your system. The &app; window contains four tabbed sections: System Displays various basic information about the computer's hardware and software. Distribution Distribution version Linux Kernel version MATE version Hardware Installed memory Processors and speeds System Status Currently available disk space Processes Shows active processes, and how processes are related to each other. Provides detailed information about individual processes, and enables you to control active processes. Resources Displays the current usage of the following system resources: CPU (central processing unit) time Memory and swap space Network usage File Systems Lists all mounted file systems along with basic information about each. You can start &app; in the following ways: Applications menu Choose System Tools MATE System Monitor. Command line Execute the following command: mate-system-monitor When you start &app;, the following window is displayed:

Shows System Monitor main window.

The &app; window contains the following elements: Menubar The menus on the menubar contain all the commands that you need to work with &app;. Display area The display area contains the system monitor information. The display area contains the following tabbed sections: System Contains a list of basic system properties, such as system software versions and hardware specifications and status. Processes Contains a list of processes organized as a table, a list of load averages over the past few minutes, and an End Process button. Resources Contains a CPU History graph, a Memory and Swap History graph, and a Network History graph. File Systems Contains a table of currently mounted file systems. Statusbar The statusbar displays information about current &app; activity and contextual information about the menu items. To display basic system information, select the System tab. In the System tab, information is organized into three groups: System Information Hardware System Status To display the process list, select the Processes tab. In the Processes tab, the processes are organized as a table. The rows of the table display information about the processes. The columns represent information fields for the processes, such as the name of the user who owns the process, the amount of memory currently being used by the process, and so on. From left to right, the Processes tab displays the following columns by default: Process Name Status %CPU Nice ID Memory Waiting Channel Unit Priority For information about how to change the columns displayed in the process list, see . A parent process is a process that spawns another process. The spawned process is a child process of the original parent process. By default, &app; does not show process dependencies. For information about how to change the default display behavior, see . Processes run in order of priority: high-priority processes run before low-priority processes. Child processes generally inherit their priority from their parent process. The priority of a process is set by the nice value of the process, as follows: A nice value of 0 means that the process has normal priority. The higher the nice value, the lower the priority. The lower the nice value, the higher the priority. For information about how to change the priority of a process, see . To sort the process list, perform the following steps: Select the Processes tab to display the process list. By default, the processes are listed by name, in alphabetical order. To list the processes in reverse alphabetical order, click on the Process Name column header. Click on any column header to sort the processes by the information in that column, in alphabetical or numerical order. Click again on the column header to sort the data in reverse alphabetical or reverse numerical order. You can modify the contents of the process list in several ways. To show all processes in the process list, perform the following steps: Select the Processes tab to display the process list. Choose View All Processes . To show only the processes that are owned by the current user, perform the following steps: Select the Processes tab to display the process list. Choose View My Processes . To show only the active processes in the process list, perform the following steps: Select the Processes tab to display the process list. Choose View Active Processes . To show process dependencies in the process list, perform the following steps: Select the Processes tab to display the process list. Choose ViewDependencies. If the Dependencies menu item is selected, the processes are listed as follows: Parent processes are indicated by a triangle symbol to the left of the process name. Click on the triangle symbol to show or hide the associated child processes. Child processes are indented, and listed with their parent process. If the Dependencies menu item is not selected: Parent processes and child processes are not distinguishable. All processes are listed in alphabetical order. To display memory maps for a process, perform the following steps: Select the Processes tab to display the process list. Select the process in the process list. Choose ViewMemory Maps, or perform a right-click and choose Memory Maps. The Memory Maps dialog displays the information in tabular format. The name of the process is displayed above the memory-map table. From left to right, the Memory Maps dialog displays the following columns: Filename The location of a shared library that is currently used by the process. If this field is blank, the memory information in this row describes memory that is owned by the process whose name is displayed above the memory-map table. VM Start The address at which the memory segment begins. VM End The address at which the memory segment ends. VM Size The size of the memory segment. Flags The following flags describe the different types of memory-segment access that the process can have: p The memory segment is private to the process, and is not accessible to other processes. r The process has permission to read from the memory segment. s The memory segment is shared with other processes. w The process has permission to write into the memory segment. x The process has permission to execute instructions that are contained within the memory segment. VM Offset The virtual memory offset of the memory segment. Private clean Unmodified pages since they were mapped that belong only to a specific process. Private dirty Pages that have been modified since they were mapped that belong only to a specific process. Shared clean Unmodified pages that are shared by multiple processes. Shared dirty Modified pages that are shared by multiple processes. Device The major and minor device numbers of the device on which the shared library filename is located. Inode The inode on the device from which the shared library location is loaded into memory. Click on any column header to sort the data by the information in that column, in alphabetical or numerical order. Click again on the column header to sort the data in reverse alphabetical or reverse numerical order. Click Close to close the Memory Maps dialog. To change the priority of a process, perform the following steps: Select the Processes tab to display the process list. Select the process for which you want to change the priority. Select the priority in EditChange Priority, or perform a right-click and choose Change Priority. If the Custom menu item is selected, the Change Priority dialog is displayed, and continue as follows. Use the slider to set the nice value of the process. The nice value sets the priority of the process: the lower the nice value, the higher the priority. To specify a nice value lower than zero, non-root users must enter the root password. Click on the Change Priority button. To end a process, perform the following steps: Select the Processes tab to display the process list. Select the process that you want to end. Choose EditEnd Process, or perform a right-click and choose End Process, or click on the End Process button. By default, a confirmation alert is displayed. For information about how to display or hide the confirmation alert, see . Click on the End Process button to confirm that you want to end the process. &app; forces the process to finish normally. This is the preferred way to stop a process. To terminate a process, perform the following steps: Select the Processes tab to display the process list. Select the process that you want to terminate. Choose EditKill Process, or perform a right-click and choose Kill Process. By default, a confirmation alert is displayed. For information about how to display or hide the confirmation alert, see . Click on the Kill Process button to confirm that you want to terminate the process. &app; forces the process to finish immediately. You usually terminate a process only if you cannot end the process normally as described in . To monitor CPU usage, select the Resources tab. &app; displays the CPU usage history in graphical format. Underneath the graph, &app; also displays the current CPU usage, as a percentage. To monitor memory and swap usage, select the Resources tab. &app; displays the memory usage history and the swap usage history in graphical format. Underneath the graph, &app; also displays the following numerical values: Used memory out of total memory Used swap out of total swap To monitor network activity, select the Resources tab. &app; displays the network history in graphical format. Underneath the graph, &app; also displays the following numerical values: Received data per second and total Sent data per second and total To monitor file systems, select the File Systems tab. &app; displays mounted file systems in tabular format. From left to right, the table displays the following columns: Device Directory Type Total Free Available Used For information about how to change the columns displayed in the file systems list, see . You can customize the Resources tabbed section in the following ways: To change the color of the line that represents CPU usage in the CPU History graph, perform the following steps: Select the Resources tab in the System Monitor window, to display the graphs and table that provide information about the usage of system resources. Click on the CPU color button. The Pick a color dialog is displayed. Choose a color from the Palette, or use the color wheel or the spin boxes to customize the color. Click OK to close the Pick a color dialog. To change the color of the lines that represent memory and swap usage in the graph, perform the following steps: Select the Resources tab in the System Monitor window, to display the graphs and table that provide information about the usage of system resources. Click on the Memory or Swap button. The Pick a color dialog is displayed. Choose a color from the Palette, or use the color wheel or the spin boxes to customize the color. Click OK to close the Pick a color dialog. To change the background color of the &app; graphs, perform the following steps: Select the Resources tab in the System Monitor window, to display the graphs and table that provide information about the usage of system resources. Click on the Receiving or Sending button. The Pick a color dialog is displayed. Choose a color from the Palette, or use the color wheel or the spin boxes to customize the color. Click OK to close the Pick a color dialog. To configure &app;, choose EditPreferences. The Preferences dialog contains the following tabbed sections: Behavior Update interval in seconds Use this spin box to specify the interval at which you want to update the process list. Enable smooth refresh Select this option to refresh smoothly. Alert before ending or killing processes Select this option to display a confirmation alert when you end a process or terminate a process. Divide CPU usage by CPU count Select this to divide each process' CPU% in the Processes table by the number of CPUs. Information Fields Use the following options to select which fields are displayed in the process list: Process Name Select this option to display the name of the process. This column may also contain an icon to indicate the application that is associated with the process. User Select this option to display the name of the user who owns the process. Status Select this option to display the current status of the process: sleeping or running. Virtual Memory Select this option to display the amount of virtual memory that is allocated to the process. Resident Memory Select this option to display the amount of physical memory that is allocated to the process. Writable Memory Select this option to display the amount of memory that can be written by the process. Shared Memory Select this option to display the amount of shared memory that is allocated to the process. Shared memory is memory that can be accessed by another process. X Server Memory Select this option to display the amount of X server memory that is used by the process. % CPU Select this option to display the percentage of CPU time currently being used by the process. CPU Time Select this option to display the amount of CPU time that has been used by the process. Started Select this option to display when the process began running. Nice Select this option to display the nice value of the process. The nice value sets the priority of the process: the lower the nice value, the higher the priority. ID Select this option to display the process identifier, also known as the pid. The pid is a number that uniquely identifies the process. You can use the pid to manipulate the process on the command line. Memory Select this option to display the amount of system memory that is currently being used by the process. Security Context Select this option to display the security context in which the process is running. Command Line Select this option to display the command line that was used to start the process, including arguments. Waiting Channel Select this option to display the waiting channel of a process where it is waiting for a resource. Control Group Select this option to display the control group a process belongs to. Unit Select this option to display the systemd unit for a process. Session Select this option to display the session under which the process is running. Seat Select this option to display the "seat" a process is assigned to. The special default seat called "seat0" always exists. Owner Select this option to display the owner of a process. Priority Select this option to display the priority of a process- how much CPU it is allowed to use. A process running with higher priority can use more of the CPU compared to the one with a lower priority. Graphs Update interval in seconds Use this spin box to specify how often you want to update the &app; graphs. Show network speed in bits Select this option to show your network speed in bits/s instead of the default bytes/s. File Systems Update interval in seconds Use this spin box to specify how often you want to update the File Systems table. Show all file systems Select this option to show all file systems, including temporary and system ones. Information Fields Use the following options to select which fields are displayed in the file system list: Device Select this option to display the location of the block file for the device. Directory Select this option to display the mount point (directory to access) of a device. Type Select this option to display the file system type. Linux supports numerous file system types like NTFS, FAT32, ext4, ext3 ext2 etc. If the file system is of any supported type, it will be shown if this option is selected. Total Select this option to display the total capacity of a file system. Free Select this option to display the amount of space not used by the file system. Available Select this option to display the amount of space left for use. Used Select this option to display the amount of used space.